6v92 oil leak

[madhatter1]

Many parts like that can be repaired if you can find the right guy. I had a showerhead on one of the Cummins that had pinhole leaks on the inner pipe. Guy at yard I go to cut it open, replaced 90 degree tube and added short piece of straight to finish off, and welded the whole thing back together. Will it last forever, no. Did it reasonably extend service life, yes.

[whoover]

I too am sure that can be welded. I had new necks for the rad caps welded or brazed to my tanks. I had them removed and had the tube bundle cleaned at the same time. Radiator shop did it all.

Walt Hoover

[Phasma2128]

Walt…
was it difficult to remove?

[Captain Ralph]

I didn’t have it pressure tested.

I too am sure that can be welded. I had new necks for the rad caps welded or brazed to my tanks. I had them removed and had the tube bundle cleaned at the same time. Radiator shop did it all.

Walt Hoover

You can see the leak. Pressure no more than 8psi and an evidence trail is showing.
This is cast iron. Solder or Brazing would be a poor gamble. Poor adhesion and in a raw water environment. The iron has to go in an oven then when hot, welded, like a block with a compatible rod. As I mentioned earlier, a block welding shop should be consulted.
I thought a replacement case was ordered.

[whoover]

In my case it was a Cummins 903, removing the heat exchanger is a bit of work and really heavy because I didn't remove the tube bundle first. I could not get the rad caps to seal so new necks were in order. Cummins parts are harder to find so for you a new tank might be an easier solution if it's easy to get. As said earlier finding someone able and willing to do the welding could be hard. The times I have found capable people but are not interested to do the work are many. I'm sure I have about a 25% success rate.

Walt Hoover

[Captain Ralph]

Just woke up thinking about this.
I was incorrect. The leak is from the coolant side of the heat exchanger.
Maybe, maybe, a patch could hold up on a properly cleaned area.

Any luck shopping for another case?

[Phasma2128]

So far no luck. I talked to a guy in Grand Rapids Mi that said he MIGHT know where to get an entire heat exchanger.

I am assuming it’s a relatively low pressure system? If this rust hole is there what are the chances of others forming? I obviously won’t know until I get into it.

[johnjen50]

I’ve been watching this and thinking that perhaps it’s time to reconfigure your
heat exchanger with a newer LARGER exchanger that would help with the cooling needs of this engine. There are numerous threads on how under capacity these tanks are for the engines they serve. Has anyone replaced their tank with a larger tank of different design to add cooling capacity? I would think it’s just an exercise in replumbing.

[Phasma2128]

That opens up a whole different set of possibilities. I will ask the mechanic

[johnjen50]

How did you make out investigating a different heat exchanger?